A. 5. Churchill's famous Iron Curtain speech warned the world about what potential threat?
Soviet spies stationed inside the United States government
b. Nuclear radiation in Hiroshima and Nagasaki
c. Growing conflict between nationalist and communist China
d. Spreading communism across Eastern Europe

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.

Iwould have to say c. the german americans.